US4299928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact modified polycarbonates
Assignee: Bayer Corp
•
Filing: 1980-03-14
•
Granted: 1981-11-10
•
Expires: 2000-03-14
Abstract
Abstract Polycarbonates having improved impact performance are provided, comprising a blend of polycarbonate resin and an acrylic rubber interpolymer composite.
Inventors
- 👤 Mark W. Witman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:37
CPC Classifications
C; C08; C08L; C08L69/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
A composition comprising a blend of about 80 to 99 percent by weight of an aromatic polycarbonate thermoplastic resin and about 1 to 20 percent by weight of a multiphase composite interpolymer comprising: (a) about 25 to 95 percent by weight of a first elastomeric phase polymerized from a monomer system comprising about 75 to 99.8 percent by weight n-butyl acrylate, 0.1 to 5 percent by weight cross-linking member, 0.1 to 5 percent by weight graft-linking monomer, and (b) about 75 to 5 percent of a second rigid thermoplastic phase polymerized in the presence of said elastomeric phase.
Claim 2
Dependent Claim
98 words
A composition comprising a blend of about 80 to 99 percent by weight of an aromatic polycarbonate thermoplastic resin and about 1 to 20 percent by weight of a multiphase composite interpolymer comprising: (a) about 25 to 95 percent by weight of a first elastomeric phase polymerized from a monomer system comprising about 75 to 99.8 percent by weight n-butyl acrylate, 0.1 to 5 percent by weight cross-linking member, 0.1 to 5 percent by weight graft-linking monomer, and (b) about 75 to 5 percent of a second rigid thermoplastic phase polymerized in the presence of said elastomeric phase.
Claim 3
Dependent Claim
27 words
The composition of claim 1, wherein said cross-linking member is 1,3-butylene diacrylate, said graft-linking member is diallyl maleate and said second, rigid thermoplastic phase is methyl methacrylate.
Claim 4
Dependent Claim
29 words
A process for improving the impact performance of polycarbonate resins comprising blending therewith about 1 to 20 percent by weight of the multiphase composite interpolymer defined in claim 1.
Claim 5
Dependent Claim
24 words
The composition of claim 1 wherein said second rigid thermoplastic phase is characterized in that its glass transition temperature is at least 20° C.
Claim 6
Dependent Claim
24 words
The composition of claim 1 wherein said second rigid thermoplastic phase is at least 50 weight percent C 1 to C 4 alkyl methacrylate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |